Here is a citizen scientist project testing which species of mushrooms the European black slug prefers: Psilocybe cyanescens, the Wavy Cap, a potent psilocybin active species or the edible Stropharia rugoso-annulata, the Garden Giant. This choice test clearly shows the slugs' preference. Could psilocybin confer a defense against slugs? Many psilocybin mushrooms host insect larvae. Flies are stimulated by spore release. It would make sense that mushrooms partner better with flying insects to spre